Hygienic Laboratory, Bulletin 46. 
Plate XI. 
Horizontal section of young female mite, from a lot placed upon a heavily intected rat for 24 
hours, then removed and placed upon a normal rat: about seventh day; section shows enor- 
mous number of segmenting sporonts. The large cyst surrounding each sporont is irregular in 
outline. Some of the sporonts are shown completely divided up into sporoblasts. Drawn with 
camera lucida. Stained with iron hematoxylin. 
